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    This file is part of OpenFOAM.

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    You should have received a copy of the GNU General Public License
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Class
    Foam::populationBalance::binaryBreakupModels::Liao

Description
    Bubble breakup model of Liao et al. (2015). The terminal velocities and drag
    coefficients are computed by an iterative procedure based on the drag model
    of Ishii and Zuber (1979) at the beginning of the simulation, assuming
    single bubbles rising in quiescent liquid.

    References:
    \verbatim
        Liao, Y.; Rzehak, R.; Lucas, D.; Krepper, E. (2015).
        Baseline closure models for dispersed bubbly flow: Bubble coalescence
        and breakup.
        Chemical Engineering Science, 122, 336-349.

        Ishii, M., & Zuber, N. (1979).
        Drag coefficient and relative velocity in bubbly, droplet or particulate
        flows.
        AIChE Journal, 25(5), 843-855.
    \endverbatim

Usage
    \table
        Property           | Description              | Required | Default value
        BTurb              | coefficient BTurb        | no       | 1.0
        BShear             | coefficient Bbuoy        | no       | 1.0
        BEddy              | coefficient BEddy        | no       | 1.0
        BFric              | coefficient Bwake        | no       | 1.0
        turbulence         | Switch for turbulence    | yes      | none
        laminarShear       | Switch for laminar shear | yes      | none
        turbulentShear     | Switch for eddies        | yes      | none
        interfacialFriction| Switch for friction      | yes      | none
    \endtable

SourceFiles
    Liao.C

\*---------------------------------------------------------------------------*/

#ifndef Liao_H
#define Liao_H

#include "binaryBreakupModel.H"
#include "LiaoBase.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace populationBalance
{
namespace binaryBreakupModels
{

/*---------------------------------------------------------------------------*\
                            Class Liao Declaration
\*---------------------------------------------------------------------------*/

class Liao
:
    public binaryBreakupModel,
    public LiaoBase
{
    // Private Data

        //- Disambiguate the population balance reference
        using binaryBreakupModel::popBal_;

        //- Optional coefficient BTurb
        dimensionedScalar BTurb_;

        //- Optional coefficient BShear
        dimensionedScalar BShear_;

        //- Optional coefficient BEddy
        dimensionedScalar BEddy_;

        //- Optional coefficient BFric
        dimensionedScalar BFric_;

        //- Switch for considering turbulent velocity fluctuation
        Switch turbulence_;

        //- Switch for considering velocity gradients in the bulk
        Switch laminarShear_;

        //- Switch for considering eddies
        Switch turbulentShear_;

        //- Switch for considering interfacial friction
        Switch interfacialFriction_;


public:

    //- Runtime type information
    TypeName("Liao");

    // Constructor

        Liao
        (
            const populationBalanceModel& popBal,
            const dictionary& dict
        );


    //- Destructor
    virtual ~Liao()
    {}


    // Member Functions

        //- Precompute diameter independent expressions
        virtual void precompute();

        //- Add to binary breakupRate
        virtual void addToBinaryBreakupRate
        (
            volScalarField::Internal& binaryBreakupRate,
            const label i,
            const label j
        );
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace binaryBreakupModels
} // End namespace populationBalance
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
